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Finding the Fourth Proportional to 256,757.58, 385,173.27 and 79,278.30

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Solution

The fourth proportional to 256,757.58, 385,173.27 and 79,278.30 is: 118,928.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,757.58 : 385,173.27 = 79,278.30 : x
  2. Step 2: Convert to fraction form
    256,757.58/385,173.27 = 79,278.30/x
  3. Step 3: Cross multiply
    256,757.58x = 385,173.27 × 79,278.30
  4. Step 4: Simplify right side
    256,757.58x = 30,535,882,051.04
  5. Step 5: Solve for x
    x = 30,535,882,051.04/256,757.58
  6. Step 6: Final answer
    x = 118,928.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.